I dont think this card is outrageously strong, but it does provide a mechanic I enjoy, just like Rod of Absorption, Wand of Wonder, and Chaos Wand before it
Seriously, check out how many amazing things White does with Auras that it traditionally struggles to do: Hero of Iroas, Starfield Mystic, and Transcendent Envoy are aggressively costed mana discounts
But this deck is far from just a 1-trick pony: Selesnya is the primary color pair for Enchantress and access to Green gives us tons of archetype staples like Sanctum Weaver for insane ramp, Sythis, Harvest's Hand for insane card draw, and Dreampod Druid for insane token production
Even losing doesnt sting so bad, because it makes me think harder about how to make the cards I have work together
You can turn this face up any time for its mana cost if its a creature card